Some people say, it is not so difficult to cut a glass slide (0.8mm to 1.2mm thickness / plate) with pen-style cutter by hand. You may not need any support equipment in that case. You are probably right at a certain size of cutting if you are skillful with your fingers.

How about the situation of 2 layered glass slides’ situation?
Can you also do it by hand? Maybe yes, but probably no. You don’t have reproducibility, we guess. Especially the surface of the section, sometimes 1 plate looks OK, but another side is no good.
If you have 2-tier glass plates, you can cut them together with our Karate Groover.
Even if you can put “something” between those plates, you will get a beautiful cross-section again and again.
When it comes to sandwiches, this Karate Groover helps you a lot, for sure!